电池(电)
二甲氧基乙烷
氧化物
分解
储能
电极
材料科学
石墨烯
电压
粒子(生态学)
纳米技术
化学工程
化学
无机化学
电气工程
电解质
有机化学
物理化学
冶金
热力学
功率(物理)
工程类
海洋学
地质学
物理
作者
Tao Liu,Michal Leskes,Wanjing Yu,Amy J. Moore,Lina Zhou,Paul M. Bayley,Gunwoo Kim,Clare P. Grey
出处
期刊:Cornell University - arXiv
日期:2018-05-08
摘要
The rechargeable aprotic Li-air (O2) battery is a promising potential technology for next generation energy storage, but its practical realization still faces many challenges. In contrast to the standard Li-O2 cells, which cycle via the formation of Li2O2, we use a reduced graphene oxide electrode, the additive LiI, and the solvent dimethoxyethane to reversibly form/remove crystalline LiOH with particle sizes > 15 um during discharge/charge. This leads to high specific capacities, excellent energy efficiency (93.2%) with a voltage gap of only 0.2 V, and impressive rechargeability. The cells tolerate high concentrations of water, water being the dominant proton source for the LiOH; together with LiI it has a decisive impact on the chemical nature of the discharge product and battery performance.
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